Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84089a9b4efe7b287fbb97be81f6594a4657488fbcb4194127319e0d768618d9' 
  AND token = '8mTYGrKafMk74zLTMSgF37XjVQtpoKMVzWJ8fqDM1Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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