Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18cf20f18fc851730316da392196f86472b4d0dc80c0f4b2097d10c58629d6ca' 
  AND token = 's5/2Rq3pZkzxMvq8nRuoR57bU5qxTz+dsiKryIWbb4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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