Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '330f5ea61a58278d145c00d26bf44c8ba1cf59778d5607182f244ba3bb754e98' 
  AND token = '1rHBV6uHAR18jr3zTYZqfmaIrs5MgQqu6em+TW9faG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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