Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54c53937854b8aaee900698c0568983c4829fc7e69f97b37b8f1cda0733a8a23' 
  AND token = 'ob4qiM6uP8yAVaU4QCCqfOwoEVooX6LS8YcpbLAjsbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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