Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f1d84f28919f9ab39aecc653ee609fa33c3d28cc1ef66f7f4fb8e2053f3aaa4' 
  AND token = 'l3IDeE/oCjZ8TZLMZb3W5OQbJNlO+lmTRBeIDcbn1i4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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