Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd80c243b02fab5e59163a84f0e56516c00479bc62700fa59bf6ca7e3a17bc27e' 
  AND token = 'FXuKtPzFRTOKCtClJfOOuo6dK0svTQp5WaVuACGDID4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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