Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd87a4189db1651b35abfac9757f8dc3b7311bb353ccba5207f47e088e55a1a3a' 
  AND token = 'q0CGLEWBZsxluadVJ0+HHcoAQHxgzq6iha8AI1JE4wg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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