Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c035295c70574451c33bc04a6d62f1907c71e45cc132e9d85f40281764db1589' 
  AND token = 'NfFx4AjQe1X2Y0KfatT5oCupYcjt+2vRf7T3/yYOVZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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