Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '642bd02f3ac5e501a38dff55e3b2f12be2a57071777feb1fc8740904b13d4871' 
  AND token = 'eA8xcH1WD6lzic5ROX2XXEHCaFER+VeQElSZK4DCopM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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