Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67d51d40e0aa4b664de2341fd85538d84374ca1ab1165c1711af7e89374907fe' 
  AND token = 'xdVygG9Z5Eetbvuscm1KsVdRNorI8BLRop32KmxjkJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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