Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f54aec18f9cf4821a35ad88d621be0e49de1d94f6af88f85a2943c00047b717' 
  AND token = '8doqNNpwA/F6aUDM5AdnY10fG6BT3d4bVxnLUfVTjhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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