Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb735a715c21561986b1c34e97120755e43d769143b35d88819779cf1a6e59d6' 
  AND token = 'OorqAqpFcWW8IskNaIgUfpbmN61kdwxCAA+2rhJMDrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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