Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dfbda731f445ebe3cb38a47f81f2eca13736e8e106b84c9282ab546f8533f93' 
  AND token = '1+VRuOAsTN48B6MJFPicY5oMiz3nCI1SRW3IZxdqPhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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