Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b49389913ce3a704b37171647c5b0bb3ac8a292b9505f96373bfe51baba3e6' 
  AND token = 'IFW/aM+ez6CRk4x1rjnbfi6pXU7UwPffGhMTkkJbhf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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