Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43f57f32e8405e285444d20047ec539bcc6d81c944877964b3e3b72d7441c108' 
  AND token = 'mHaEWNf9Ce7A/hJCenCHpCgZHQDEArPofpdU4Fs6FrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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