Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '175ec88d87ab150c580378400ab5d4fd017f1d88900a982b1c0ad3f455447a68' 
  AND token = 'cS69KGWOD/zkurSq6U2YlXdqraHi1S/sYjOj/R/THn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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