Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ce9034da75b3c68eafb05633aee9fb999f73d818c0f9ea37e93cdf65183e6fc' 
  AND token = 'V/LlgwFHQGcrnjSe1uopHfUoJwt5IM2SlO7gzsRrS7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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