Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27771d178c12530c9fc9d4cccf0f9d9e13ad3fb1f5e824bcb0a165dbc090c6c3' 
  AND token = '7oCR6yn1/52uEbl45ZCxLg8mzOH8aW2wOw24Qsj/IPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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