Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97d24c563a6e0d8394b14cc9f67efa4fa7465b718cd60f3ac56ae3d3a2ed9ba7' 
  AND token = 'VH+iTLQn7wrinErkW30PmI0d/wNKl9/SRjWgZ7h0j9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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