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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e179f735e92f7f7d952d8ec93503a4e04647f9a05e83d773f34a157d7e65e9cc' 
  AND token = 'AnWU9eCFG9sDYXZLtiG9AK5wf2Nb3HOP261ZFqksfUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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