Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8036f45951b076246fb79176b8c738b30c9402e7ba87c118d8c1a0c66bc9bccd' 
  AND token = 'jiN2toc3ksZLolFzIIwTB7KeY6Slh3Lj1Gb0wCvQXoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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