Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5efa9aad43f235576b77971d8abe9ae28b3328f80adf9bd340b5f1922e25a066' 
  AND token = 'mPMkemfnzP3oophcLfe+ZLtzZp3/zsVJsvC76Uf455A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}