Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef6841d0af7c995f95dd7110837f8466ebf15293d4ac88c01d86a272e9b6eaa1' 
  AND token = 'G/6U7EUkW8EUINRIJsM9B8MjftHlP2TdeVC2H42zpes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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