Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f7c1deacaf3e9644dd225303ed3d8f0a85ad46c8afafdfe0d4632a51c235cdf' 
  AND token = 'YZXdGoJLNeNLqcpdSB2Vva/6BxkYmyOnl293+zyHRiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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