Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25f78659399b441018d0993a9f2531bd502b6aa114dfa759550289486ec7ea51' 
  AND token = '0+dDN6jNteUzG1jDPoTR0bKAe8sU+wyjDwJrcn7BLPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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