Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3e0c375bb68c985c03078625326c6c6c2514bcaaf045e6b49d98bb6bee7b5f1' 
  AND token = '3f1K906uZZof3o7dwoAjxbyXcT52FMTVBaW/e9riNYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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