Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f91957f63980b565be1c405c161fdff5a9b8c903ef1f5137e78751794f2aac55' 
  AND token = 'xPrV/Wq2nN3nCb41ewkCnjUyFnmT7a/8VvXmRzsJnms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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