Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46ad673eeba266b9fbad75abf2c21b9b1be4843947de4d93d2f5dc1f76e04b92' 
  AND token = 'fGjt41flRqg0UdRCxsCTpeuWXZAFSTB7nn1LgpM1VnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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