Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '475276afe68b1a06ff22b0abb3a73f23d7ee904144db88e299ca2c8e64eef39c' 
  AND token = 'yPJ9h+9jD7DGrrP3/xexcPACvq+cB49WJXHm8KOVcQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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