SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37dd38388e248c77750c620d92fc6091b6661f9e5853ff9048190347b8480bb4' 
  AND token = 'j2ybup8vRFqdLp5mnj/bxeM6ZeEQGSJAZT+r9mGJ+B4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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