Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de9194e3f6f158ff63b49c28f918cdc69af2894ca0f31ff8ee25a3738ee5373' 
  AND token = 'H3o1/DJBMoYKahiM/GVCQC+fxXzlZRdA5yJS5blIeWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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