Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '176ab6d9718132b565e26915e2915c3f101702e68f6d10a3748dc8cfc856c295' 
  AND token = 's0lLPdfbj9kt1rxUfb8cDmnoJ+a33x3Uib6sjdbRKcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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