Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97e042db74d8357128a170787e272636551ad18fdd5dd5d7bdf74f3da6844200' 
  AND token = 'u2NL7K9jrd+e6EPTwK6FQc3yA3EGnLK1hD6KeslGz3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}