Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '515381918c8ceb84f9c3be16957c5cf70298a2a5975692bf67ebf1a3c5e96635' 
  AND token = '3kVDv2pTT0K8Xu6cRJ3mABq77tleQ4XrFGipSpaAUR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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