Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30ff81ffdb0453bc3f1a00b9e3d0e7972659f9e6a66cc5c6911a4cf2ca4a3917' 
  AND token = 'fItbcDwezZWXiJY9Ygj4RCLcuqXzkrj7msodYd2hpl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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