Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '045495c0a4beeb66edbd412598c2fd40ce9063c726b9ebb06679eec7df99e523' 
  AND token = 'GLIX6hPQmwcO5Nmpyg3LLyK7HrVQ9PglT2JM+YPGXhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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