Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ff041e89caa6520786ad54d8a61d5323601445285e1e62579787e366c47fd0d' 
  AND token = 'y1V2TYnfb2YOFBtAfTp7hkTsUUOi6P/j/Q1zpTRSaoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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