Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8aeff9dd14c44ce517ab4e06d611f1cba62d2717a34056fb3d74ace7ffc4b9d9' 
  AND token = 'b9cPNXopiDO7+sgS8a4Ve7gfrS35zoPxPdVBSOzRBJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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