Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70d4c788f48bc51c6fc4d335b2ce93c8c256b76fb890e183a26509ec99924018' 
  AND token = 'OxYTRx5XWiTx/3qpSV/U2blgjuuc9ydnJj/doDLY9D8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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