Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc951c6978190a22cf0c326fb543b1e8ee9e6c1dcc037cc19a08585b47ee930d' 
  AND token = 'x96qgnOQP4Plj8xh08eYFq54wJYOgxxJ3SLtjnWlZbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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