Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3c6babc07a680da31008c73a5931d0505cb42a8c0731d31db0a7b95c2335d6a' 
  AND token = 'ArsP8nxeP1MJQAA3x2MZm+XpjT/rW+tKrRa3CWuWL8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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