Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b611de939a5a6249d3b065d759819199f9e85d208a6c4e61bea3585542991dcb' 
  AND token = '41cosgCvG5Ije+lvTLz+y1Sh3VcXUVRQ3xM5/1Goz0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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