Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0097306e054201b038ac6d4b5cb61c40fc74913de938bd5869debff9accfd883' 
  AND token = 'XMl5OAahAr9ZWJ04JfV/n4p0hzAm/UwIN/MKwUQYZHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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