Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbe37300fc5015dba004eb637106ce714fd61941aac6a83810b9f71ed7d4a4cb' 
  AND token = 'UYQTIEpsir3/hLI2mUGC7cFctBgDTc/cpZZD1NaTPqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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