Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6519afa2df17dd864ec3283b51a94557b0a24c35703e33deff347c7e7fbccfa8' 
  AND token = 'fNNUwu4jGII7Fp4YhnXPLjf2tUdj44OUnFLWijg/Kcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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