Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '838e38eeba426a08b4db68e28b65e249549ec49c79fcda887e11f65c44c1f9f9' 
  AND token = 'SqoqsDfMoHsAJ76ugcWqYj7UGSfm8JHvh7Ve86oaEdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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