Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b5f368896dada43aaf3552abf76c3dc7f8bd1f241462ccea9c873c318626bdb' 
  AND token = 'rlhSNyyzkanN1bI0CNlvRCc87BCCzfWbgvoP5R4cd7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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