Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1fbcaa58809253c8f3dac006b38198c95247ba3d494e6ca6bc1333eaa186914' 
  AND token = 'QD3idjHW4CyAOTzXw2H55AuIxsdsInlEWgkAnWdjY4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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