Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ac34d5adc8602d428d99f03ea0142188eb4708f6592090561fb4e63e079c6a6' 
  AND token = 'YUd+qWQoowL/k75Ak5CPIe16IdisKPdBzAucStlJf/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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