Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ced966878e4f83b4869a2c19edd92037d9a21715d4e8c5e140c905d2f987a8' 
  AND token = 'jpB6JyYMxMHNqmnDP0jjTF0XoxYz0i1pxiyvHizGta8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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