Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53173b1da48a7586887b68e7abac7e3c63d543d4b02ab239af121e6ed9e494a9' 
  AND token = 'wbHUPEXShNYKc1iPNxinzdJmv3hWdFw3Tb9AfEG31s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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