Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e876d97c2400dcd13e969b2f320ce714da5f711d412a93ab76984d291ca70a11' 
  AND token = 'VWJsZEzcyQXF/NjitJAg1/N3z7yGpQ3ljJK3VI3FxRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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