Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cb6e1314016d1e1dc9a3f47deac7d96187f2417eae82f6e9f40d9f92c45dbec' 
  AND token = 'Tky9xSSPKgO9isl5QwzgnW40n+OA1+NWf46wDBfGkrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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