Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbe35617dddcc1cafaaa8829973aebceef2ca8354fb21aac22075b981e66858b' 
  AND token = 'xXCLZmdoLXSOeJkfm+Z8Q1JCCPw3NBudLoVrPJXnXFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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