Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7afe1ed3f04a9e12890e23e167cf35863b4c29308767e44fe47086590cd24ca8' 
  AND token = 'WwVC+E5eNiob0Z+jn2tj3Hj/Q5cXVhhxpP4NwTOekWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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