Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '570aad25ca1a63e6fa76307519c53c5832a934259a29207301d4933c14e16af3' 
  AND token = 'm9Ou2WEvGdjLOLkCY9qkobSn2kjUxrZ9ixpWLeWfj14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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