Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '019b198a7f64599a6f169b6d50cd614ac25863f94c9270a03e03725011951285' 
  AND token = 'f/lIlyUX1fkUgPzuNGW8bxVisxSnFRF2DiPZsaN7xXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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