Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a0a0bdb8fde8025ee8300cfb8348e44183691c28bf4ba783216015b6d72768c' 
  AND token = '0PqKwAQHpe7ML1YCUWb+Hh2TdUoa0U6Sjy2q0IqbZuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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