Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cb938dbb6272ca36512bc1e2183b81c7349278bd624e356f0c56f9c103350a8' 
  AND token = 'MYc/4UnBbDer5P15vpVsYVs/m6Pg5b6Hw5cGWM/A1dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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