Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eb45f04ba7f1d7ff53e10fef143b843d608c09d49bba96551030e80d7c0b8dd' 
  AND token = 'Yq9YumMIp0v9MDuR/G8dnxzMd8KnjIBag5Ej9qw945M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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