Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d04bb1d159890b31055b3a13cc9b311eb31ff7995776ab42f43c217426b62e0' 
  AND token = 'GWW9eW1xMk+Kg/pUXBSdTGWZwKB0B/xMX+P0/dIbpOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}