Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '155f7658c56d2dfa3ddfed9a4301188213e77227c73244ebdff52b0f902f0b16' 
  AND token = 'i5rmdpa5vxwkB9zoXNNVxtWM8BCpmEiyN7cULDl4c4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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