Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '889f64b994311b752c077760339ba7148d635fe3fe4b7e2830ab5ebd66bf9d17' 
  AND token = 'm25XcpjmRd0QzG3vy7MyztTK8ka6IxJksAqruVmxREI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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