Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7be55251a54ba6187d4bb2507373ec4786b62f04b00628e6dfa1eee935f2914d' 
  AND token = 'CudF4Ze7tGIt+TtNn2hY4F3s+Of9pOsQwY0VrJfChgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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