Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2137b95d6010a2b4532bfcd5877576cd6f8f2aff85fc17f75001b96584f38a88' 
  AND token = 'WGpwRkbtoT2xrCJMagcKeeRzOtZXLftANCRz7x3jUDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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