Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '864024f8c261a3c596beb87e269857860dbf7d4ee745dab7387d104a7375b339' 
  AND token = 'lpDyNCrsWUjdWLWLRSfDk5BT77PWCkx5Ppcv4wayU80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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