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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60e22ec0bc79dfc4b43497e724e3b34cdf260dbf0be558fbd6f5bd2b80450967' 
  AND token = 'MOP/0x5k7B1ju16weQhk7UgKKX1uURC2TgK/v8rDtJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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