Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24852f98bf92bf8678b431922b764f2c15aeb024db0c75f90d3f885f9301db61' 
  AND token = 'rxUkCCBksKegq79x2PNUPMVYBM0E5pok7MBqTJi/V4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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