Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ace002791083773e96b7f71152c86e2b3705a575cc1a02be95ec27726a71e77' 
  AND token = 'i2LP6eRwUbxvsGjWbEtkqzpFy+Tj2wlea46ayRGjhOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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