Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af21a9fd5ee7d75562f1a66efecb6a4ee3192f372f134e604f0756deb2655400' 
  AND token = '9MmU1Q/6zPTvExB6i1L8TqfglISmxB9Q5rDJXLj2ySQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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