Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e509be8ee9a788abed9cb45dd28b59aff9305e1e980b959e5ab57964d1893d55' 
  AND token = 'Ft6lzO8CjC11cLICOXOtZR3TirLl+z8IkR3KqGaLRHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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