Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a5a82f75854406364db034c8dccf5831d4f5749f526dd00ea05d842c7e941d0' 
  AND token = 'SjcjutDoi+Nl37+nAFZr2XkaoqJWo6ck+wW+K//6e64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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