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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ed0f130c484e8fad960849c32a4f3d97677ab1a727a86bd96b349143cc8a30' 
  AND token = 'tmMsiP3qiG0ovIBYYyJek8LcyA4ghDBxmj2hEC1EMfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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