Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '638592a80745475e19839d8323ee9db548e353894c3a1d46bc1b24a758c8c56f' 
  AND token = 'ZyeoWsEW0Wdmi1OoSPCDC3tw74B/EbCbTAxbjrWVwkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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