Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ca453a7f121bdcfe53f4212192b0c35f1d0ea0e72a32c2906e34b20b02645f1' 
  AND token = 'WtaCML312nXxZiP/ibWrdTrJCq0U82b11i2dEeNxSDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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