Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fed8693b3ee728797c82f2f388c04950479b22a43107d1c3e01c46e2e6013400' 
  AND token = '6lfGKfrSCiH8B7pZQ6ZJw9P8JG16Y50aUP9HD5m99yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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