Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aa69bc67bc952078cc9f2527260f4b0ad9f5cadade8583618cbf959ac899de4' 
  AND token = 'Od5GAItslQgOibOaudmni1FzGxtfoySuDUnGPe31Edc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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