Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '806635fca330e868cbeff9bc3ad0ee0f7a18128af1c5855054b771f7eadc00b5' 
  AND token = 'GFMfyQ8fZpOJgSy6+MaL3O7CKnTdgHbrJ+uel4Zbfnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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