SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'df1b98ef0528658bea59a0051962fd4f463cfc14598c9d3c27e56762bed1b271' 
  AND token = 'BFwtJ0phvyNSAL2zW0kGTkMVNjBgDT66CQKp/7tffvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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