SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ffbebe188e451637e9220f42329180538c2b09acdd3e832a0280f9420ac43d' 
  AND token = '25iLKJBLIOzcdUqoiAfw/h5UmrVOzKFYhljfwSsbhJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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