Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e94f39a3cb9884fb4e021a007e927d478aa12e13b5f5b1e02bfe5e32e4c0b488' 
  AND token = 'sojkglsFT0atgbTQ28Zp3diLN9jkri4B1BTIm5SOCEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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