Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1be9ecec328f6ca322c4610748f01eedf3b667987a6a7de1db9d784bd8726ffc' 
  AND token = 'XLVixPhMrr7WUasVOhBYIoJ4/Dnazi370+bxGcNsRU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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