Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '424cbb44b9010689632035b2712f038377d9f1412332565b92bac098877d9446' 
  AND token = 'laKZXN8a9QH2KJx4k/aSLsuzQZnQNUZB29H5SW2F4r4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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