Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '121ccba767278ca244ed633815a6aa5fb8fbd70c597cc98f5e80bf9b8d4645f6' 
  AND token = 'Rhex7oeOiLft/OpkYxVzO+TYTVJbJKR5RLD3D4IvucQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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