Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5608d23b14e3a0c213acec04b5f3538c297cfa1b4ee49d02055af527259ee9a7' 
  AND token = '9WZI5AkuR/KMMpxlarrQxl0hWQqpDt04+4/9H2gZVMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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