Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e02d4124cc7ae6e42f90d705794d3680a15b6ff2e290c2326e14f035c789d8d' 
  AND token = 'z0SuYdtfzY8rCtTWMmzVzdyZ6W8k0a+sMBKSs2JG0OA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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