Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '947977c56a1fb3c381d3e922321a822f8bd8e080fbda36f612a8cd094bbb4230' 
  AND token = 'hixcmIILm1lr+TX/ffbLeRJPqXm2C1NzKoXC70+k4jA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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