Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2101810bd2217f3ff24b6c4a5b6adab38c1c6df1619b78ef63d3f7d0a887e663' 
  AND token = 'faxtkrgeWRlnXCPtUoSWvx+fM5jh5tjCS5g/ronl3MU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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