Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29d07585215aeeb0f806e819db1d4eea6b6b7f54d0d281515c42ae1d4886e54a' 
  AND token = 'ElBmcp12Iiv8o7t6FKsW7zuHcO6iHBYbcE/wxI+nDfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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