Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19ee5e7b0d6d8035ccb49777603867c8524b68bd852ec36c6e32e2fa3ef580c6' 
  AND token = '4weM2mT/Hai/HqGVU29FFwsVYgNLANZ6656yjeZjP4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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