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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd606a9849b2c0f858fa9ac2b8e26b9413bf0c61ba0c0809cbad6f36d5f15834b' 
  AND token = 'Y13C9POkt5e3lxj/tpGlje4XkUZS1YX5Zl9PC6GXXTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}