Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '318947977d73dc0aec390c17fb50e29179699c99c26a76a40eb053a471a544c7' 
  AND token = 'h2tG0J/8Xynrczl42tcriqviN/mm9aM6cJSVS7koPss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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