Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fc118a6ae3131c0542c8713a0be8bc993d401c3150f8a5770567ac995ba1f47' 
  AND token = 'DwPwUpYTt7noKGdJ0jy1xE2NEy1Deha5zN+ToI+ksrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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