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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdc706568e79b7fe595021045b6a61b02ae6d663fb53d20304d386432dc4fb47' 
  AND token = '1yba+SheRYHykRA7mmmNhQO61iOT+O8WfLRK9JX+Hbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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