Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afc7e8c1d9cf4bcbd897c122d4227aa8d465e0da45f555ef1d8bd706e1c6daab' 
  AND token = 'XQb6cBswJHx7s1lgYtlNHn+DJtpTwmQEc+CdqUAEjUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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