Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97dc890c8c4910a69ec3cdfe6547464193ff1625dc030bb0b4490bb94bc0606d' 
  AND token = '5ldWZVi8XHN05YpjZbsxt80HP4z0Rd6cNPipxARzRn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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