Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3496a677899a7b0b51d27105bc264c9a2524a79e046d7e7a278c453f6d49d4dd' 
  AND token = 'Fz4ZixB99f5DOFGs94rjD5F5Y1oefZQr/iAP+tBaKN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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