Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '214e65a39118958659cf25f6f88bc5269ae04e48056498538bae0a2bc357a9a8' 
  AND token = 'gA/4CGXWzt8NkIFdbjXfwWDOjpzTQ9hWQQNADkRY82Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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