Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e925a5939bc6f7f55448a9ad6211a798b063138445de8297cdbb8c100020581' 
  AND token = '42WF9/KPwoT1UerP3llha57dBY+NNoO1g5tcJZlnzRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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