Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a3d9561b278e39de7e623d159d48437bdc863c81813706231b173d6dbf811a9' 
  AND token = 'G+GhKmGevhgDQvF3Uq29ObW1LC5OI2kkpWG3Kc6bPsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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