SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ca00952b6dc4c6932d760dbb142309c83145d35f7e2d6b8a1aa9ba43348f7b6' 
  AND token = 'Z3Q/wQcauoMjRG+xqFKGYVYR6AgLYfdhedZYk1snZ6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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